| Hardwood
cuttings (20-30 cm long) from kiwifruit (Actinidia chinensis var.
deliciosa [A. deliciosa ]) cultivars Hayward, Monty, Toumuri, Abbot,
Bruno, and Allison were immersed in IBA at 0, 2500, 3000, 3500, and 4000
ppm for 15 seconds and transferred to rooting beds containing either
sand or sawdust. Significant variations were recorded among IBA
treatments and cultivars, and between rooting media. Among the
cultivars, Abbot recorded the highest rooting percentage (59.38%). Among
the IBA rates, 3000 ppm resulted in the highest rooting percentage with
both sand (59.55%) and sawdust (77.53%) rooting media. Higher rooting
percentage was obtained with sawdust (45.64%) than with sand (37.09%)
as the rooting medium. Cuttings rooted on sand exhibited greater number
of fibrous (19.75) and secondary (18.48) roots, as well as new shoot
growth (12.47 cm), than the cuttings rooted on sawdust (4.27, 3.20, and
4.73 cm, respectively). The results indicate that sawdust is more
suitable for root initiation, whereas sand is more beneficial for root
and shoot development. |
